Structure and magnetic properties of 6-layered hexagonal oxides Ba{sub 3}Cr{sub 2}MO{sub 9} (M = Mo and W)
- Tokyo Inst. of Technology, Yokohama (Japan)
Structural analysis and measurement of magnetic susceptibility were carried out for the 6H-type hexagonal compounds Ba{sub 3}Cr{sub 2}WO{sub 9} were determined by Rietveld analysis of powder X-ray diffraction data to be P6{sub 3}/mmc and P62c, respectively. Chromium ions were found to occupy the centers of face-shared octahedra, with tungsten or molybdenum ions at the centers of corner-shared octahedra. The magnetic susceptibilities of Ba{sub 3}Cr{sub 2}MoO{sub 9} and Ba{sub 3}Cr{sub 2}WO{sub 9} were explained using the two sublattice and dimer models, respectively; the difference may be due to the difference in the valence states of Cr and Mo in Ba{sub 3}Cr{sub 2}MoO{sub 9} and Cr and W in Ba{sub 3}Cr{sub 2}WO{sub 9}.
- OSTI ID:
- 283004
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 120; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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